Hip joint assembly



FIG. 1 is a perspective view of the hip joint assembly;

FIG. 2 is a front view of the hip joint assembly;

FIG. 3 is a side view of the hip joint assembly;

FIG. 4 is a back view of the hip joint assembly;

FIG. 5 is a side view opposite that of FIG. 3 of the hip joint assembly;

FIG. 6 is a bottom view of the hip joint assembly; and,

FIG. 7 is a top view of the hip joint assembly. 

CLAIM The ornamental design for a hip joint assembly, as shown and described. 